bluetooth: don't hit an assert if latency is queried for a stooped recording stream

https://bugzilla.redhat.com/show_bug.cgi?id=537422

diff --git a/src/modules/bluetooth/module-bluetooth-device.c b/src/modules/bluetooth/module-bluetooth-device.c
index 2bbae41..d6868b8 100644 (file)
--- a/src/modules/bluetooth/module-bluetooth-device.c
+++ b/src/modules/bluetooth/module-bluetooth-device.c
@@ -972,10 +972,14 @@ static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t off
         case PA_SOURCE_MESSAGE_GET_LATENCY: {
             pa_usec_t wi, ri;
 
-            wi = pa_smoother_get(u->read_smoother, pa_rtclock_now());
-            ri = pa_bytes_to_usec(u->read_index, &u->sample_spec);
+            if (u->read_smoother) {
+                wi = pa_smoother_get(u->read_smoother, pa_rtclock_now());
+                ri = pa_bytes_to_usec(u->read_index, &u->sample_spec);
+
+                *((pa_usec_t*) data) = (wi > ri ? wi - ri : 0) + u->source->thread_info.fixed_latency;
+            } else
+                *((pa_usec_t*) data) = 0;
 
-            *((pa_usec_t*) data) = (wi > ri ? wi - ri : 0) + u->source->thread_info.fixed_latency;
             return 0;
         }